The imports values refer to the "Cost, insurance and freight (c.i.f.)" value which represents the cost of the goods on arrival in Macao including insurance, freight, commissions and all other costs.
The exports values refer to the "Free on board (f.o.b.)" value which represents the selling price of the goods to the customer abroad, including local transportation costs, local insurance charge, documentation fees, commissions, etc.
Generally speaking, import value on c.i.f. basis is higher than that in f.o.b. basis, because the former includes insurance and freight involved in both the exporting point and importing point.